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Finding the Fourth Proportional to 70,752.78, 97,636.44 and 38,921.40

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Solution

The fourth proportional to 70,752.78, 97,636.44 and 38,921.40 is: 53,710.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,752.78 : 97,636.44 = 38,921.40 : x
  2. Step 2: Convert to fraction form
    70,752.78/97,636.44 = 38,921.40/x
  3. Step 3: Cross multiply
    70,752.78x = 97,636.44 × 38,921.40
  4. Step 4: Simplify right side
    70,752.78x = 3,800,146,935.82
  5. Step 5: Solve for x
    x = 3,800,146,935.82/70,752.78
  6. Step 6: Final answer
    x = 53,710.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.